3 Sudden stop of the escalator in the subway and people falling

Forgot to install a gear coupling between the two gearboxes, which are set in motion the whole machinery. Because of this, when the escalator stopped, there was a failure of parts, and flew through the mechanism of its severity.As a result, Emergency Situations injured nine passengers. The majority of these physicians stated the broken arms and legs, including the public, and traumatic brain injury.